Last time I tried installing the game using the download client it had uploaded more data than the one I received and took so much time to finish.
Is there an (official) way of downloading Starcraft2 directly, or a sanctioned torrent instead of using their download client?
or any alternative method, as long as it's from trusted, legal sources
Best Answer
You can extract the corresponding torrents from the Blizzard Downloader.
On a mac, you can just look for the torrent file within the Blizzard Downloader folders (as already mentioned here).
On Windows, you have to cut the torrent out of the downloader binary. Here you can find the following list of tools/scripts which do exactly this:
You can also extract the torrent by yourself either manually by using a hex editor or by writing your own script to do the work. The source code comments from WoWTorrentEx provide a nice documentation on how to find the torrent within the binary.
After you successfully extracted the torrent file, use your favorite torrent client for downloading.